// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//

package handler

import (
	"net/http"

	"github.com/gorilla/mux"
	"github.com/kumose/fn"
	logprinter "github.com/kumose/kmopt/pkg/logger/printer"
	"github.com/kumose/kmopt/server/session"
)

// MaxMemory is the a total of max bytes of its file parts stored in memory
const MaxMemory = 32 * 1024 * 1024

// UploadTarbal handle tarball upload
func UploadTarbal(sm session.Manager) http.Handler {
	return &tarballUploader{sm}
}

type tarballUploader struct {
	sm session.Manager
}

func (h *tarballUploader) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	fn.Wrap(h.upload).ServeHTTP(w, r)
}

func (h *tarballUploader) upload(r *http.Request) (*simpleResponse, statusError) {
	sid := mux.Vars(r)["sid"]
	logprinter.Infof("Uploading tarball, sid: %s", sid)

	file, handler, err := r.FormFile("file")
	if err != nil {
		// TODO: log error here
		return nil, ErrorInvalidTarball
	}
	defer file.Close()
	defer r.MultipartForm.RemoveAll()

	if err := h.sm.Write(sid, handler.Filename, file); err != nil {
		logprinter.Errorf("Error to write tarball: %s", err.Error())
		return nil, ErrorInternalError
	}

	return nil, nil
}
